REI just launched its fall sale — save up to 51% on Patagonia, Arc'teryx, The North Face and more

The Houdini jacket is ideal for a wind-blocking outer layer for breezy mountain treks — and it's just 3.7 ounces (104g). Three colors are discounted to $82, including the pictured sage-blue three colors $82. One color is $58, but only available in XS. I'd recommend size XS for a petite woman, too — I wear a men's size S Torrentshell, and it fits me perfectly.

The Patagonia Better Sweater is a super-warm, knit-aesthetic fleece with a half-zip and a slim fit, ideal for daily wear or hikes. It's another well-respected piece in the outdoor sphere, and because it's so desirable, it's only available in one size: XXS. I'd snap this up ASAP if you fit an XXS.

The North Face's Yumiori fleece is a perfect hiking-slash-everyday fleece. Smartphones fit snugly into the chest pocket, one zipper even doubles as a hair tie, and it's finished with durable water repellent. Three colors are available at 51% off in sizes S-XL.

The Alta Vista jacket is intended to be an outer layer in wet conditions, but for chilly days, you'll also need a light fleece like the Patagonia R1 Air. This jacket is discounted in three colors and is available in sizes M-XXL.

The Houdini Stash Half-Zip Jacket is just as functional as the Houdini, but this version also stows away into its own pocket. Three colors are on sale at $100: this pictured colorway, a cool stone pattern, and green. Most sizes are available even in the sale versions.

The Patagonia R1 Pullover is a midlayer, meaning it's intended to be worn between a thermal base layer and an outer waterproof or windproof jacket like the Patagonia Houdini. Right now, it's

The Patagonia R1 Jacket is a light, versatile jacket with stretchy grid-woven fabric to keep you warm on chilly mountain trails. It's also packable and layerable, perfect for underneath a waterproof jacket or thicker coat. Three colors from XXS-XL are discounted by 31%.

The Arc'teryx Squamish Hoody is completely windproof and finished with DWR, making it a versatile outer layer for those nippy wintry hikes. There's even a capped hood for keeping your face dry. Currently three colors from XS-XL are discounted.

The Arc'teryx Atom Insulated Hoody is a versatile piece: it could either be your outer layer for fall hikes or your mid-layer for super-cold winter mountain treks. Available in three colors in XL-XXL.